When the Mirza brothers were writing the script of Dhanwan, they were writing it with only Rajesh Khanna in their mind as they thought and decided that only Kaka will suit the role and their condition was, if a filmaker wants the script, he must take Rajesh Khanna in the tittle role. Filmaker Sohanlal Kanwar was very interested to make film on that script, when he heard it and Kanwar, wanted his regular hero Manoj Kumar ( be-imaan, pehchan, sanyasi) to play the lead, but the Mirza brothers only wanted Rajesh Khanna. As Sohanlal Kanwar wanted the script. Sohanlal Kanwar had to accept their condition.
The only film of Lyricist Sahir Ludhoanvi with music composer Hridayanath Mangeshkar.
The first major film of music composer Hridayanath Mangeshkar.
Lata Mangeshkar gave the mahurat clap at the launching of the film. The year was in 1977.
The songs of Dhanwan were written by Poet Sahir Ludhuanvi and this was one of his last film.